JPS56141359A - Preparation of dye - Google Patents
Preparation of dyeInfo
- Publication number
- JPS56141359A JPS56141359A JP4634280A JP4634280A JPS56141359A JP S56141359 A JPS56141359 A JP S56141359A JP 4634280 A JP4634280 A JP 4634280A JP 4634280 A JP4634280 A JP 4634280A JP S56141359 A JPS56141359 A JP S56141359A
- Authority
- JP
- Japan
- Prior art keywords
- dye
- sulfuric acid
- organic solvent
- formula
- containing compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: In esterifying a β-hydroxyethylsulfonyl group-containing compound by reacting it with sulfuric acid, to control the concentration of sulfuric acid in a system to a theoretical value and to obtain high-purity dye, by distilling away existing water through an azeotropic mixture with an organic solvent.
CONSTITUTION: A β-hydroxyethylsulfonyl group-containing compound [preferably a compound shown by the formula II [A is (substituted) phenylene or naphthylene]] shown by the formula I (D is residue of organic dye molecule; n is 1W4) is suspended in an organic solvent, e.g., orthodichlorobenzene, etc. and esterified with sulfuric acid. Simultaneously formed water is distilled away out of the system through azeotropic mixture with an organic solvent, to give a reaction dye having a β-sulfate ethyl sulfonyl group shown by the formula III.
EFFECT: Small waste water contamination.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4634280A JPS6036181B2 (en) | 1980-04-08 | 1980-04-08 | Dye manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4634280A JPS6036181B2 (en) | 1980-04-08 | 1980-04-08 | Dye manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56141359A true JPS56141359A (en) | 1981-11-05 |
JPS6036181B2 JPS6036181B2 (en) | 1985-08-19 |
Family
ID=12744457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4634280A Expired JPS6036181B2 (en) | 1980-04-08 | 1980-04-08 | Dye manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6036181B2 (en) |
-
1980
- 1980-04-08 JP JP4634280A patent/JPS6036181B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6036181B2 (en) | 1985-08-19 |
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